Move about://-related constants from //content to //url

chrome/browser/history/history_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
@@ skipping 476 matching lines @@
   // Even after navigate completes, the currently-active tab title is
   // 'Loading...' for a brief time while the history page loads.
   content::WebContents* web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   base::string16 expected_title(base::ASCIIToUTF16("History"));
   content::TitleWatcher title_watcher(web_contents, expected_title);
   chrome::ExecuteCommand(browser(), IDC_SHOW_HISTORY);
   EXPECT_EQ(expected_title, title_watcher.WaitAndGetTitle());
 
   ui_test_utils::NavigateToURLWithDisposition(
-      browser(), GURL(content::kAboutBlankURL), NEW_FOREGROUND_TAB,
+      browser(),
+      GURL(url::kAboutBlankURL),
+      NEW_FOREGROUND_TAB,
       ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
   chrome::ExecuteCommand(browser(), IDC_SHOW_HISTORY);
 
   content::WebContents* active_web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   ASSERT_EQ(web_contents, active_web_contents);
   ASSERT_EQ(history_url, active_web_contents->GetURL());
 
   content::WebContents* second_tab =
       browser()->tab_strip_model()->GetWebContentsAt(1);
   ASSERT_NE(history_url, second_tab->GetURL());
 }